A one-year-old baby is among three children and four adults being treated for injuries after two buggies collided on Hamilton Island.

A CQ Rescue spokeswoman told The Huffington Post Australia two helicopters had arrived at the Queensland tourist island, about 800km north of Brisbane, and it was not yet known whether patients would be taken to hospital in Mackay or Townsville while a third helicopter had been requested.

The baby was reportedly being treated for leg injuries with Queensland Ambulance classing five people as serious and three as stable.